Add lightd code, auto light can work by infrared and relay now

guowenxue

2021-01-23 8fee9f5701ffdcc17e1f0f2453d495fe849d1fe2

 apue/2.Socket/socket_client.c

@@ -109,7 +109,8 @@
          }
       }

       //printf("Read %d bytes data from server: '%s'\n", rv, buf);

       sleep(5);
    }